A person takes a picture during a tour on Lake Powell at the Glen Canyon National Recreation Area, Wednesday, July 15, 2026, near Page, Ariz. A bathtub ring of light minerals on the canyon wall shows the high water mark of the reservoir. (AP Photo/John Locher)

Houseboats are moored at the Antelope Point Marina on Lake Powell at the Glen Canyon National Recreation Area, Wednesday, July 15, 2026, near Page, Ariz. A bathtub ring of light minerals on the canyon walls show the high water mark of the reservoir. (AP Photo/John Locher)

Vitalii Volna drives a jet ski on Lake Powell at the Glen Canyon National Recreation Area, Wednesday, July 15, 2026, near Big Water, Utah. A bathtub ring of light minerals on Lone Rock behind shows the high water mark of the lake. (AP Photo/John Locher)

The Wahweap Marina floats on Lake Powell at the Glen Canyon National Recreation Area, Wednesday, July 15, 2026, near Page, Ariz. (AP Photo/John Locher)

People view the Glen Canyon Dam from a viewpoint above the Colorado River, Tuesday, July 14, 2026, in Page, Ariz. (AP Photo/John Locher)

People look at the Glen Canyon Dam, Tuesday, July 14, 2026, near Page, Nev. (AP Photo/John Locher)

Boaters swim in a canyon on Lake Powell at the Glen Canyon National Recreation Area, Wednesday, July 15, 2026, near Page, Ariz. (AP Photo/John Locher)

People paddle through a canyon on Lake Powell at the Glen Canyon National Recreation Area, Wednesday, July 15, 2026, near Page, Ariz. (AP Photo/John Locher)